ESD PROTECTION CIRCUIT AND RF SWITCH

摘要

An ESD protection circuit is connected in parallel to a MIM capacitor between a first terminal and a second terminal. First Schottky diodes are connected in series to each other and have anodes connected on the first terminal side and cathodes connected on the second terminal side. Second Schottky diodes are connected in series to each other and connected in anti-parallel to the first Schottky diodes. When an RF signal is inputted to neither the first terminal nor the second terminal, the first terminal has a higher DC voltage than that of the second terminal. The number of the first Schottky diodes is greater than the number of the second Schottky diodes. The number of the second Schottky diodes is set such that an amplitude of the RF signal does not attenuate to predetermined amplitude of the RF signal when the RF signal passes through the MIM capacitor.

主权项

1. An ESD protection circuit connected in parallel to a MIM capacitor between a first terminal and a second terminal, comprising:
a plurality of first Schottky diodes connected in series to each other and having anodes connected on the first terminal side and cathodes connected on the second terminal side; and a plurality of second Schottky diodes connected in series to each other and connected in anti-parallel to the plurality of first Schottky diodes, wherein when an RF signal is inputted to neither the first terminal nor the second terminal, the first terminal has a higher DC voltage than that of the second terminal, the number of the plurality of first Schottky diodes is greater than the number of the plurality of second Schottky diodes, and the number of the plurality of second Schottky diodes is set such that an amplitude of the RF signal does not attenuate to predetermined amplitude of the RF signal when the RF signal passes through the MIM capacitor.